Class Terminal

lib/terminal.js:4–157

// low-level terminal interactions
class Terminal{

    constructor(outputStream){
        this.stream = outputStream;

        // default: line wrapping enabled
        this.linewrap = true;

        // current, relative y position
        this.dy = 0;
    }

    // save cursor position + settings
    cursorSave(){
        if (!this.stream.isTTY){
            return;
        }

        // save position
        this.stream.write('\x1B7');
    }

    // restore last cursor position + settings
    cursorRestore(){
        if (!this.stream.isTTY){
            return;
        }

        // restore cursor
        this.stream.write('\x1B8');
    }

    // show/hide cursor
    cursor(enabled){
        if (!this.stream.isTTY){
            return;
        }

        if (enabled){
            this.stream.write('\x1B[?25h');
        }else{
            this.stream.write('\x1B[?25l');
        }
    }

    // change cursor positionn
    cursorTo(x=null, y=null){
        if (!this.stream.isTTY){
            return;
        }

        // move cursor absolute
        _readline.cursorTo(this.stream, x, y);
    }

    // change relative cursor position
    cursorRelative(dx=null, dy=null){
        if (!this.stream.isTTY){